| 摘要 |
<p>PURPOSE:To announce the same time information to respective devices connected to a common bus by outputting the time information to the information transfer signal line of the common bus when driving a bus use enabling signal, fetching the time information on the information transfer signal of the common bus into the respective devices connected to the common bus and holding the fetched information. CONSTITUTION:When a bus use enabling signal (b) is driven, registers 2.1 and 2.1' in devices 2 and 2' connected to the common bus fetch the information outputted onto an information transfer signal line (d) of the common bus regard less of the state of an identification signal (c) and hold the fetched information. When the bus use enabling signal (b) is driven, the time information is outputted onto the information transfer signal line (d) by an arbitrating device 1 of the common bus. The time information fetched into the registers 2.1 and 2.1' in the devices are outputted as signals (e) and e' while being held, and used as the time information in the devices 2 and 2'.</p> |
